UK Auto Repair Questions?
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Is there a warning light in the speedometer?Describe exactly what the problem is, how it feels, how it is noticed, etc.
I wouldn't tie that to the exhaust. The exhaust pipes have internal membranes for a sporty sound. The sound changes when I warm up.
But if you feel a slight shaking it can be a hiwneis for occasional misfires, I would start with the spark plugs, check them visually and change them if necessary. Sometimes the ignition coils are also defective and do not ignite the engine well.
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Yes that`s possible.
There are leak detection sprays for engines with which you can spray the intake trunking while the engine is running. If there is a leak, the engine starts to jolt strongly.
That's not the case with your car.
If the piston had a hole, the oil level would rise, because fuel would come into the oil pan, a mixture of oil and fuel would come out of the exhaust and the car would only run on 3 cylinders. or however variant two, if the connecting rod breaks, the piston would come out of the engine with a loud bang. Both would have completely different symptoms.
You could have saved yourself the compression test. As I said in my last answer, the problem with cylinder 4 is excluded.
What came out of the test for leaks in the intake system?
No, not in the intake tract, just while the engine is running on the outside.